This low-profile hex nut, manufactured to ISO 4035, is a thin jam nut with reduced load capacity, designed to lock other nuts in place and prevent them from vibrating loose. Made from grade 04 steel with a hot-dip galvanized finish, it's well-suited for steel structures and outdoor applications that demand long-term protection with minimal maintenance. The nut features an ISO metric thread with a 6H tolerance class and should be paired with externally threaded components—such as bolts or threaded rods—rated to 6az tolerance before galvanizing. Since the threads are tapped after galvanizing, they don't carry a zinc coating themselves; corrosion resistance is instead provided by the zinc layer on the mating component.